TEMO M35 Cobalt Step Drill Spiral Flute - Durable Dual Sizes

In this review the TEMO M35 Cobalt Step Drill stands out as a practical, metalworking tool for professionals and hobbyists who need fast, reliable hole enlargement and clean start holes in thin materials. The single biggest reason to buy is its M35 cobalt construction paired with double spiral flutes, which combine heat resistance and efficient swarf clearance so the bit cuts through stainless steel and mild steel cleanly while holding an edge through repeated use.

Key Features

• M35 cobalt construction: Provides increased heat resistance and wear life for cutting tougher metals compared with ordinary HSS.
• Two hole sizes stamped: 7/8 in and 1-1/8 in markings next to each step make size identification fast and error free during work.
• Double spiral flutes: Improve swarf evacuation so holes stay cleaner and cutting is faster with less chatter in thin sheets.
• 1/4 in hex shank with quick release slot: Reduces slipping in the chuck and makes bit changes quicker on common quick-change holders.
• Self-starting design: Helps create clean holes in thin materials without needing a pilot drill, saving time on repetitive tasks.
• Multipurpose cutting: Suitable for stainless steel, metal, plastic, fiberglass and wood, and also for enlarging existing holes.

Who It's For

This step drill is best for metal fabricators, HVAC technicians, electricians, and serious DIYers who frequently drill or enlarge holes in sheet metal and need a durable bit that slices through stainless steel and mild steel. The M35 alloy and spiral flute design particularly suit users who prioritize cutting speed and tool life.

Those who should look elsewhere include users who only drill wood or masonry occasionally and want a large assortment of sizes from one single bit; this model provides two specific step sizes and is optimized for metalworking rather than a wide range of tiny incremental steps.

Pros & Cons

Pros

• Excellent cutting performance on stainless steel and mild steel due to the M35 cobalt alloy.
• Fast material removal and cleaner holes thanks to the double spiral flutes.
• Clear size stamps and a 1/4 in hex shank with quick release slot make it user friendly and slip resistant.
• Durable edge retention reported by users after many holes, offering good value for money.

Cons

• Only two step sizes (7/8 in and 1-1/8 in) limit versatility compared with multi-step bits that cover many incremental sizes.
• Designed for thin material hole cutting and enlarging; not a substitute for twist drills on deep hole drilling.

Specifications

Our Verdict

The TEMO M35 Cobalt Step Drill is a solid, value-oriented tool for anyone who needs reliable cutting in sheet metal and occasional stainless steel work. Its M35 cobalt construction and spiral flute design deliver faster cutting and longer life, making it a sensible purchase for tradespeople and dedicated DIY users who will use those two step sizes regularly.

Frequently Asked Questions

Can this bit cut stainless steel?
Yes, the M35 cobalt HSS formulation is intended to cut stainless steel and resists heat and wear better than standard HSS.

Will the bit fit quick-change chucks?
Yes, the 1/4 in hex shank with quick release slot is compatible with common quick-change holders and reduces slipping.

Are both sizes stamped on the bit?
Yes, the 7/8 in and 1-1/8 in sizes are stamped next to each step for easy identification.